I am facing an intermittent issue with Sitecore CMS 6.5 and ECM 1.3.1 rev 111202. When a user opens an email from ecm - it isn't being reflected in the engagement plan and it happens for emails sent via ECM, in the logs the error message 'Item could not be found from query string. [ID is "{840DACC9-60C1-4705-BCAC-D188BD7D2AD8}"' is displayed. The item exists in the backend (can find it via the GUID above) and also in the Sitecore master database. Inspection of the request to the server via fiddler reveals that the url is structured correctly:
myurl/sitecore/RegisterEmailOpened.aspx?sc_itemid=%7b840DACC9-60C1-4705-BCAC-D188BD7D2AD8%7d&sc_camp=FBCF7F99F5C74F67BD8D976A7C16B7A1&ec_as=FA987FCE345347D4BA1C5584455A3AB5
I have checked and rechecked the database connection strings but everything seems to be correct. This has had me stuck for a while, so any help appreciated.
Cheers